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GET /hyperkitty/api/list/[email protected]/email/6CBXDRVXMB3AKGPE2UU7HAPSLOD2EJ3W/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6CBXDRVXMB3AKGPE2UU7HAPSLOD2EJ3W/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "6CBXDRVXMB3AKGPE2UU7HAPSLOD2EJ3W", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/BIYU76GIZGXO3NTVTCQ7E4Q7IDHY65H4/", "sender": { "address": "broberts (a) mta.ca", "mailman_id": null, "emails": null }, "sender_name": "Bruce Robertson", "subject": "[amsat-bb] Re: Preamp", "date": "2007-05-04T10:58:27Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/GWQ6FRA3AEJPBUTWHDDWCLPC53AADH5P/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Quoting Paul Luggar <[email protected]>:\n\n> I suggested a preamp on a handheld would possibly overload the front end\n> of \n> the radio as my Kenwood THD7E overloads with the arrow when I go\n> hilltopping \n> with it. With a preamp and local conditions in the UK it would be\n> useless, \n> \"If\" RF conditions are super quiet then it may be ok but why preamp with\n> \n> such a short feeder?\n\nPaul:\nWhile it's often stated that a mast-mounted preamp helps to overcome the\nlosses in feedline, the low-noise preamp's advantages go beyond that. In\nthis case, if the preamp has a lower noise figure than that of the first\nstage of the HT, a more sensitive overall receiving system will result. \nThis increased sensitivity comes at the loss of some dynamic range,\nhowever. On the whole, in low signal work, we need to aggressively reduce\nlocal noise anyway to hear the signal, with or without preamp, so the\ntrade-off is a good one for us.\n\n73, VE9QRP\n", "attachments": [] }